TANTALUM-BASED COATINGS ON STAINLESS STEEL FOR FUEL-CELL BIPOLAR PLATES

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F20%3A43921696" target="_blank" >RIV/60461373:22310/20:43921696 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.confer.cz/metal/2020/3536-metallic-materials-for-fuel-cell-bipolar-plates" target="_blank" >https://www.confer.cz/metal/2020/3536-metallic-materials-for-fuel-cell-bipolar-plates</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2020.3536" target="_blank" >10.37904/metal.2020.3536</a>

Jazyk výsledku

angličtina

Název v původním jazyce

TANTALUM-BASED COATINGS ON STAINLESS STEEL FOR FUEL-CELL BIPOLAR PLATES

Popis výsledku v původním jazyce

Stainless steels are promising materials for fuel cell bipolar plates. It meets high demands for bipolar plates, good thermal and electrical conductivity, low cost, good mechanical properties. However, corrosion stability in fuel cell environment is either poor or achieved by passive layer. Passive layer improves corrosion resistance, but decrease electrical conductivity, respectively increase contact resistance. Coating stainless steel is one approach, how to obtain suitable material. This study focused on commonly used stainless steel AISI 316L as reference and two Ta-based coatings, tantalum coating and tantalum coating with upper layer of Ta2O5 and RuO2. All materials were tested in simulated PEMFC environment, diluted sulfuric acid of pH 3 with 1 ppm fluoride ions at 80 °C. Open circuit potential, linear sweep voltammetry anodic and cathodic dynamic scans were carried out. Materials were compared only based on short-term electrochemical measurements. Despite that, tantalum coating perform better corrosion resistance than bare steel, passive layer of tantalum is non-conductive, thus inappropriate for fuel cells.

Název v anglickém jazyce

TANTALUM-BASED COATINGS ON STAINLESS STEEL FOR FUEL-CELL BIPOLAR PLATES

Popis výsledku anglicky

Stainless steels are promising materials for fuel cell bipolar plates. It meets high demands for bipolar plates, good thermal and electrical conductivity, low cost, good mechanical properties. However, corrosion stability in fuel cell environment is either poor or achieved by passive layer. Passive layer improves corrosion resistance, but decrease electrical conductivity, respectively increase contact resistance. Coating stainless steel is one approach, how to obtain suitable material. This study focused on commonly used stainless steel AISI 316L as reference and two Ta-based coatings, tantalum coating and tantalum coating with upper layer of Ta2O5 and RuO2. All materials were tested in simulated PEMFC environment, diluted sulfuric acid of pH 3 with 1 ppm fluoride ions at 80 °C. Open circuit potential, linear sweep voltammetry anodic and cathodic dynamic scans were carried out. Materials were compared only based on short-term electrochemical measurements. Despite that, tantalum coating perform better corrosion resistance than bare steel, passive layer of tantalum is non-conductive, thus inappropriate for fuel cells.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2020 - 29th International Conference on Metallurgy and Materials

ISBN

978-80-87294-97-0

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

627-631

Název nakladatele

Tanger s.r.o.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

20. 5. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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